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从生态、生产和遗传育种等方面分析了四川小麦多小穗育种的理论依据,并就多小穗品种绵农2号的选育方法进行了讨论。这些方法有:(1)多组合小群体确定目标组合;(2)在目标组合中确定重点目标组合;(3)在重点目标组合中确定重点株系;(4)进行阶梯式杂交。 相似文献
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Natural hybridization among wingless carabid beetles of the subgenusOhomopterus (Carabidae, genusCarabus) is reviewed, and its significance in the evolution of this subgenus discussed. Natural hybridization occurs between parapatric
species of similar size. Two case studies of natural hybridization suggest that natural hybridization could have affected
the evolution of this subgenus in different ways. When there is a large difference in genital morphology between hybridizing
species, interspecific copulation often results in genital injuries that causes mortality of copulating individuals, and hence
reduces the fitness of hybridizing individuals greatly. In such a case, hybridization may be effective in maintaining the
parapatric distribution of the two species, and in the long term, may promote reinforcement selection for traits which are
effective in prezygotic reproductive isolation. When the morphological difference in genitalia is not so large as to cause
genital injury, a hybrid population may be established at the intermediate zone between two parental species, provided that
the immigration rates of the two species into the intermediate zone are small. Thus, natural hybridization may have contributed
to both divergence and reticulate evolution in this subgenus. 相似文献
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《Chinese Journal of Communication》2013,6(3):348-366
Unlike other global media products that are imported from overseas, international women's magazines in China are published via licensing agreements or joint ventures with local companies. These ownership patterns allow local editions of international women's magazines to negotiate the tensions and contradictions between the global players and local publishers. Given the influence of cultural and commercial forces in different economic environments, international women's magazines provide a challenging platform for exploring the interaction between global and local forces. Through a theoretical framework of hybridity theory and in-depth interviews with editorial personnel from the magazine industry, this study explores the global and local forces that have contributed to the production process of international women's magazines in China. The findings reveal that these magazines are a result of a multi-level convergence of local realities and global influences. Although there are factors of control and dependence in many areas such as the publishing ideas, editorial policies, the training of personnel, and the quality of production, both Western-style and Japanese-style women's magazines tend to appropriate and rework global cultures to satisfy local readers' needs, albeit in different ways. As a result, local and transnational influences are inextricably interwoven in the production process of international women's magazines in China. The study provides an extensive understanding of the global processes, the consumers, and the cultural forces that are shaping the media, particularly magazines in China. 相似文献
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骆萍 《重庆工商大学学报(社会科学版)》2006,23(3):133-135
后殖民主义翻译理论以权力差异为先导,彻底打破了传统翻译理论结构主义范式下语言和文化平等的乌托邦式的理论预设,把翻译研究纳入更广阔的社会、文化大背景之中,拓宽了翻译研究的视野和思路。 相似文献
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Christina Maags 《Social Policy & Administration》2021,55(1):113-127
Although the party‐state has embarked on a mission to increase elder care services, evaluating this development according to different sectors demonstrates certain challenges. Official statistics do not include sector‐specific information, and while provider websites suggest that elder care services are largely in public hands, Chinese experts argue that they are mostly “civilian‐run.” How can we explain these discrepancies in data on Chinese elder care? Drawing on the concept of hybridization and triangulating quantitative and qualitative data, I argue that the party‐state's efforts to “socialize” elder care provision has resulted in hybridization within the industry which blurs the line between care providers and obfuscates the stark role of the state in elder care service provision. During the implementation of state‐initiated hybridization, providers misclassify their ownership type to benefit from financial incentives or circumvent political control, resulting in even greater hybridization and fragmentation on the ground. 相似文献
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绵阳经济技术高等专科学校学报 《西南科技大学学报(哲学社会科学版)》2000,17(4):14-16
绵油 11号系采用阶梯式复合杂交 ,经多年优良基因重组逐渐积累 ,集型间、种间、地理及生态远缘之亲本的优良因子于一体的优质杂交油菜新品种。它具有丰产性突出、增产潜力大、硫苷含量低、含油率高、抗倒耐病力强、适应性广等优点。同时具有植株矮、花序短、结角密等与大面积推广品种不同的特点。适宜在四川、重庆的平丘区种植 ,云南、贵州、陕西的部分地区种植 相似文献
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殖民时期文学中的文化表征受到殖民思想的影响,强化了殖民者与殖民地之间的不平等关系。通过将本土语言文化翻译进入后殖民文学文本,后殖民杂糅写作起着重写后殖民文化身份的作用。这种写作挑战宗主国文化权威,改写传统的东西方文化关系,重新展示第三世界文化精神,真实反映殖民地国家的艰难处境,在强势文化单一声音中混杂了边缘文化多种不同的声音,从而重写了第三世界后殖民文化身份。 相似文献
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综述了原生质体培养的研究进展,原生质体培养在理论上和品种改良中的应用。在理论研究中的应用有三个方面:1、细胞生理现象的研究;2、细胞核与细胞质相互关系的研究;3、病毒侵染与复制机理的研究。在品种改良中的应用采用的方法包括二个方面:1、遗传操作;2、突变体的筛选。 相似文献
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胡晓萌 《安徽理工大学学报(社会科学版)》2007,9(1):33-36
翻译的策略一直是译界关注的问题。翻译中的归化和异化是近几年国内译论的热门话题。从杂合角度讨论了归化和异化的问题,并结合实例说明了归化和异化/杂合的运用和关系。 相似文献